Finding the Fourth Proportional to 21,061.77, 29,065.30 and 11,501.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.77 : 29,065.30 = 11,501.74 : x
2. Step 2: Convert to fraction form
   21,061.77/29,065.30 = 11,501.74/x
3. Step 3: Cross multiply
   21,061.77x = 29,065.30 × 11,501.74
4. Step 4: Simplify right side
   21,061.77x = 334,301,531.20
5. Step 5: Solve for x
   x = 334,301,531.20/21,061.77
6. Step 6: Final answer
   x = 15,872.44